331 lines
18 KiB
JSON
331 lines
18 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-95105",
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"assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
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"state": "PUBLISHED",
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"assignerShortName": "EEF",
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"dateReserved": "2026-09-25T07:00:01.880Z",
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"datePublished": "2026-10-06T08:37:56.987Z",
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"dateUpdated": "2026-10-06T11:40:42.775Z"
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},
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"containers": {
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"cna": {
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"affected": [
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{
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"collectionURL": "https://repo.hex.pm",
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"cpes": [
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"cpe:2.3:a:danielberkompas:cloak:*:*:*:*:*:*:*:*"
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],
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"defaultStatus": "unaffected",
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"modules": [
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"'Elixir.Cloak.Ciphers.AES.CTR'",
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"'Elixir.Cloak.Ciphers.Deprecated.AES.CTR'"
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],
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"packageName": "cloak",
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"packageURL": "pkg:hex/cloak",
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"product": "cloak",
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"programFiles": [
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"lib/cloak/ciphers/aes_ctr.ex",
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"lib/cloak/ciphers/deprecated/aes_ctr.ex"
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],
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"programRoutines": [
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{
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"name": "'Elixir.Cloak.Ciphers.AES.CTR':encrypt/2"
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},
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{
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"name": "'Elixir.Cloak.Ciphers.AES.CTR':decrypt/2"
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},
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{
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"name": "'Elixir.Cloak.Ciphers.Deprecated.AES.CTR':decrypt/2"
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}
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],
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"repo": "https://github.com/danielberkompas/cloak",
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"vendor": "danielberkompas",
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"versions": [
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{
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"lessThan": "*",
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"status": "affected",
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"version": "0.1.0-pre",
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"versionType": "semver"
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}
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]
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},
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{
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"collectionURL": "https://github.com",
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"cpes": [
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"cpe:2.3:a:danielberkompas:cloak:*:*:*:*:*:*:*:*"
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],
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"defaultStatus": "unaffected",
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"modules": [
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"'Elixir.Cloak.Ciphers.AES.CTR'",
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"'Elixir.Cloak.Ciphers.Deprecated.AES.CTR'"
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],
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"packageName": "danielberkompas/cloak",
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"packageURL": "pkg:github/danielberkompas/cloak",
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"product": "cloak",
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"programFiles": [
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"lib/cloak/ciphers/aes_ctr.ex",
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"lib/cloak/ciphers/deprecated/aes_ctr.ex"
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],
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"programRoutines": [
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{
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"name": "'Elixir.Cloak.Ciphers.AES.CTR':encrypt/2"
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},
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{
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"name": "'Elixir.Cloak.Ciphers.AES.CTR':decrypt/2"
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},
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{
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"name": "'Elixir.Cloak.Ciphers.Deprecated.AES.CTR':decrypt/2"
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}
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],
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"repo": "https://github.com/danielberkompas/cloak",
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"vendor": "danielberkompas",
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"versions": [
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{
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"lessThan": "*",
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"status": "affected",
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"version": "2bd17019e285b55c5c218cc842537bf9280f24c3",
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"versionType": "git"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"cpeMatch": [
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{
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"criteria": "cpe:2.3:a:danielberkompas:cloak:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "0.1.0-pre",
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"vulnerable": true
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}
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],
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"negate": false,
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"operator": "OR"
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}
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],
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"operator": "AND"
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}
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],
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"credits": [
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{
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"lang": "en",
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"type": "finder",
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"value": "Peter Ullrich"
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},
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{
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"lang": "en",
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"type": "reporter",
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"value": "Peter Ullrich"
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},
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{
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"lang": "en",
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"type": "coordinator",
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"value": "Jonatan Männchen / EEF"
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}
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],
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"dateAssigned": "2026-10-06T08:37:34.000Z",
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"descriptions": [
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{
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"lang": "en",
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"supportingMedia": [
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{
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"base64": false,
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"type": "text/html",
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"value": "<p>Reliance on Obfuscation or Encryption of Security-Relevant Inputs without Integrity Checking vulnerability in danielberkompas cloak allows an attacker with write access to stored ciphertext to make it decrypt to a chosen value via bit flipping.</p>\n<p><code>Cloak.Ciphers.AES.CTR</code> encrypts with AES-256 in CTR mode and stores the key tag, the IV and the ciphertext with no MAC. <code>decrypt/2</code> checks only the key tag and the minimum length before it returns the plaintext, and <code>Cloak.Ciphers.Deprecated.AES.CTR</code> decrypts the legacy format the same way. CTR is a stream cipher, so a value XORed into the stored ciphertext is XORed into the plaintext at the same offset. An attacker who can write to the encrypted store (for example through SQL injection or a compromised replica) and who knows or can guess a stored plaintext can replace it with any value of the same length. The application receives that value with no error.</p>\n<p>This issue affects cloak: from 0.1.0-pre onward.</p>"
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},
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{
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"base64": false,
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"type": "text/markdown",
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"value": "Reliance on Obfuscation or Encryption of Security-Relevant Inputs without Integrity Checking vulnerability in danielberkompas cloak allows an attacker with write access to stored ciphertext to make it decrypt to a chosen value via bit flipping.\n\n`Cloak.Ciphers.AES.CTR` encrypts with AES-256 in CTR mode and stores the key tag, the IV and the ciphertext with no MAC. `decrypt/2` checks only the key tag and the minimum length before it returns the plaintext, and `Cloak.Ciphers.Deprecated.AES.CTR` decrypts the legacy format the same way. CTR is a stream cipher, so a value XORed into the stored ciphertext is XORed into the plaintext at the same offset. An attacker who can write to the encrypted store (for example through SQL injection or a compromised replica) and who knows or can guess a stored plaintext can replace it with any value of the same length. The application receives that value with no error.\n\nThis issue affects cloak: from 0.1.0-pre onward."
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}
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],
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"value": "Reliance on Obfuscation or Encryption of Security-Relevant Inputs without Integrity Checking vulnerability in danielberkompas cloak allows an attacker with write access to stored ciphertext to make it decrypt to a chosen value via bit flipping.\n\nCloak.Ciphers.AES.CTR encrypts with AES-256 in CTR mode and stores the key tag, the IV and the ciphertext with no MAC. decrypt/2 checks only the key tag and the minimum length before it returns the plaintext, and Cloak.Ciphers.Deprecated.AES.CTR decrypts the legacy format the same way. CTR is a stream cipher, so a value XORed into the stored ciphertext is XORed into the plaintext at the same offset. An attacker who can write to the encrypted store (for example through SQL injection or a compromised replica) and who knows or can guess a stored plaintext can replace it with any value of the same length. The application receives that value with no error.\n\nThis issue affects cloak: from 0.1.0-pre onward."
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}
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],
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"impacts": [
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{
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"capecId": "CAPEC-39",
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"descriptions": [
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{
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"lang": "en",
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"supportingMedia": [
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{
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"base64": false,
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"type": "text/html",
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"value": "<p>An attacker who can write to the encrypted store can set encrypted fields with known or guessable contents, such as roles, flags, or fixed-format records, to values of their choice without the key. The application decrypts and trusts the forged value.</p>"
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},
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{
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"base64": false,
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"type": "text/markdown",
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"value": "An attacker who can write to the encrypted store can set encrypted fields with known or guessable contents, such as roles, flags, or fixed-format records, to values of their choice without the key. The application decrypts and trusts the forged value."
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}
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],
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"value": "An attacker who can write to the encrypted store can set encrypted fields with known or guessable contents, such as roles, flags, or fixed-format records, to values of their choice without the key. The application decrypts and trusts the forged value."
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}
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]
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}
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],
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"metrics": [
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{
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"cvssV4_0": {
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"Automatable": "NOT_DEFINED",
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"Recovery": "NOT_DEFINED",
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"Safety": "NOT_DEFINED",
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"attackComplexity": "LOW",
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"attackRequirements": "PRESENT",
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"attackVector": "NETWORK",
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"baseScore": 8.2,
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"baseSeverity": "HIGH",
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"privilegesRequired": "NONE",
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"providerUrgency": "NOT_DEFINED",
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"subAvailabilityImpact": "NONE",
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"subConfidentialityImpact": "NONE",
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"subIntegrityImpact": "NONE",
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"userInteraction": "NONE",
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"valueDensity": "NOT_DEFINED",
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"vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N",
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"version": "4.0",
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"vulnAvailabilityImpact": "NONE",
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"vulnConfidentialityImpact": "NONE",
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"vulnIntegrityImpact": "HIGH",
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"vulnerabilityResponseEffort": "NOT_DEFINED"
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},
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"format": "CVSS",
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"scenarios": [
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{
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"lang": "en",
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"value": "GENERAL"
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}
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]
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-649",
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"description": "CWE-649 Reliance on Obfuscation or Encryption of Security-Relevant Inputs without Integrity Checking",
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"lang": "en",
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"type": "CWE"
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}
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]
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}
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],
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"providerMetadata": {
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"orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
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"shortName": "EEF",
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"dateUpdated": "2026-10-06T08:37:56.987Z"
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},
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"references": [
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{
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"name": "EEF CNA record for CVE-2026-95105",
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"tags": [
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"related",
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"third-party-advisory"
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],
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"url": "https://cna.erlef.org/cves/CVE-2026-95105.html"
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},
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{
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"name": "OSV record EEF-CVE-2026-95105",
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"tags": [
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"related"
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],
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"url": "https://osv.dev/vulnerability/EEF-CVE-2026-95105"
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},
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{
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"name": "Introducing commit 2bd1701 in danielberkompas/cloak",
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"tags": [
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"related"
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],
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"url": "https://github.com/danielberkompas/cloak/commit/2bd17019e285b55c5c218cc842537bf9280f24c3"
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}
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],
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"source": {
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"discovery": "EXTERNAL"
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},
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"title": "Cloak AES-CTR cipher lacks ciphertext authentication, allowing chosen-plaintext forgery by bit flipping",
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"workarounds": [
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{
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"lang": "en",
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"supportingMedia": [
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{
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"base64": false,
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"type": "text/html",
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"value": "<p>Configure the vault with <code>Cloak.Ciphers.AES.GCM</code> as the default cipher and re-encrypt existing values, for example with the <code>cloak.migrate.ecto</code> task from cloak_ecto. Then remove <code>Cloak.Ciphers.AES.CTR</code> and <code>Cloak.Ciphers.Deprecated.AES.CTR</code> from the vault configuration, so that ciphertext in the CTR format is no longer decrypted. AES-GCM authenticates the ciphertext and rejects modified values.</p>"
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},
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{
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"base64": false,
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"type": "text/markdown",
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"value": "Configure the vault with `Cloak.Ciphers.AES.GCM` as the default cipher and re-encrypt existing values, for example with the `cloak.migrate.ecto` task from cloak_ecto. Then remove `Cloak.Ciphers.AES.CTR` and `Cloak.Ciphers.Deprecated.AES.CTR` from the vault configuration, so that ciphertext in the CTR format is no longer decrypted. AES-GCM authenticates the ciphertext and rejects modified values."
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}
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],
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"value": "Configure the vault with Cloak.Ciphers.AES.GCM as the default cipher and re-encrypt existing values, for example with the cloak.migrate.ecto task from cloak_ecto. Then remove Cloak.Ciphers.AES.CTR and Cloak.Ciphers.Deprecated.AES.CTR from the vault configuration, so that ciphertext in the CTR format is no longer decrypted. AES-GCM authenticates the ciphertext and rejects modified values."
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}
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],
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"x_proofOfConcept": [
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{
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"lang": "en",
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"supportingMedia": [
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{
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"base64": false,
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"type": "text/html",
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"value": "<ol>\n<li>Encrypt <code>\"role=user \"</code> with <code>Cloak.Ciphers.AES.CTR.encrypt/2</code> and a random 32-byte key.</li>\n<li>Without the key, XOR the last 10 bytes of the result (the ciphertext body) with <code>:crypto.exor(\"role=user \", \"role=admin\")</code>. Leave the key tag and the IV unchanged.</li>\n<li>Call <code>Cloak.Ciphers.AES.CTR.decrypt/2</code> on the modified value. It returns <code>{:ok, \"role=admin\"}</code>.</li>\n</ol>"
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},
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{
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"base64": false,
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"type": "text/markdown",
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"value": "1. Encrypt `\"role=user \"` with `Cloak.Ciphers.AES.CTR.encrypt/2` and a random 32-byte key.\n2. Without the key, XOR the last 10 bytes of the result (the ciphertext body) with `:crypto.exor(\"role=user \", \"role=admin\")`. Leave the key tag and the IV unchanged.\n3. Call `Cloak.Ciphers.AES.CTR.decrypt/2` on the modified value. It returns `{:ok, \"role=admin\"}`."
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}
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],
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"value": "* Encrypt \"role=user \" with Cloak.Ciphers.AES.CTR.encrypt/2 and a random 32-byte key.\n* Without the key, XOR the last 10 bytes of the result (the ciphertext body) with :crypto.exor(\"role=user \", \"role=admin\"). Leave the key tag and the IV unchanged.\n* Call Cloak.Ciphers.AES.CTR.decrypt/2 on the modified value. It returns {:ok, \"role=admin\"}."
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}
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]
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},
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"adp": [
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{
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"references": [
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{
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"url": "https://cna.erlef.org/cves/CVE-2026-95105.html",
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"tags": [
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"exploit"
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]
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}
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],
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2026-10-06T11:37:58.212117Z",
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"id": "CVE-2026-95105",
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"options": [
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{
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"Exploitation": "poc"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-10-06T11:40:42.775Z"
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}
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}
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]
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}
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} |